In Halo 3, all human projectile weapons eject shell casings when firing. On the base of these cartridges there is writing that says "CHIEF" then "EG-X"; the first word obviously being a reference to John-117. As the writing is small it is difficult to read from even a moderate distance, and because in Halo 3 the bullet casings disappear after a short time, it is easiest to see the writing on the casings in Theater mode. This is best done when the camera is detached from the player and zoomed in.